PHP和CSS样式来实现菜单

上一篇 / 下一篇 2006-10-16 16:52:22 / 天气: 晴朗 / 心情: 高兴 / 个人分类：PHP杂谈

CSS:

ur {
margin-left: 0;
padding-left: lem;
}
li{
list-style-type: disc;
list-style-image:url(down.png);
}
li.file{
list-style-type:square;
list-style-image:url(right.png);
}
a:link,
a:active,
a:visited{
color: #000;
font-family: Verdana;
font-size:13px;
text-decoration:none;
background-color:#FFF;
display:block;
width:125px;
border:1px solid #CCC;
}
a:hover{
background-color:#CCC;
}
a:link.live,
a:active.live,
a:visited.live,
a:over.live{
border: 1px dotted #808080;
}

javascript:;" onClick="javascript:tagshow(event, 'PHP');" target="_self">PHP脚本：

<html>
<head>
<title>advanced bulleted-list menu</title>
<link rel="stylesheet" title="default" href="style.css" />
<script type="text/javascript">

</script>
</head>
<body>

<?php

// menu title => menu target
$menu = array('Menu One'=>array('Page One'=>'blist_menu.php?pg=1',
                  'Page Two'=>'blist_menu.php?pg=2'),
              'Menu Two'=>array('Page Three'=>'blist_menu.php?pg=3',
                  'Page Four'=>'blist_menu.php?pg=4'),
              'Menu Three'=>array('Page Five'=>'blist_menu.php?pg=5',
                  'Menu Four'=>array('Page Six'=>'blist_menu.php?pg=6',
                      'Page Seven'=>'blist_menu.php?pg=7')));

// alternative method to using cookies
function array_search_recursive($needle, $haystack) {
    $pos = null;
    $keys = array_keys($haystack);
    while(!$pos && (list($garbage, $value)=each($keys))) {
        if(is_scalar($haystack[$value])) {
            if($haystack[$value] === $needle)
                $pos[] = $value;
        } elseif(is_array($haystack[$value])) {
            if($pos = array_search_recursive($needle, $haystack[$value]))
                array_unshift($pos, $value);
        }
    }
    return $pos;
}

// recursive function to draw menu
function draw_menu($menu, $preserve, &$id) {
    if($id == 0)
        echo "<div id=\"$id\">\r\n<ul>\r\n";
    else
        echo "<div id=\"$id\" style=\"display:none;\">\r\n<ul>\r\n";
    $id += 1;

    foreach($menu as $key=>$value) {
        if(is_array($value)) {
            if(@in_array($key, $preserve))
                $toggle = $id;
            echo "<li><a href=\"#\" onclick=\"toggle($id);\">$key</a></li>\r\n";
            draw_menu($value, $preserve, $id);
        }
        else {
            echo "<li class=\"file\">";
            if(@in_array($key, $preserve))
                echo "<a class=\"live\" href=\"$value\">$key</a>";
            else
                echo "<a href=\"$value\">$key</a>";
            echo "</li>\r\n";
        }
    }
    echo "</ul>\r\n</div>\r\n";
    if(isset($toggle))
        echo "<script language=\"javascript\">toggle($toggle);</script>\r\n";
}

$id = 0;
$base = basename($_SERVER['PHP_SELF']);
$self = isset($_SERVER['QUERY_STRING']) ? $base.'?'.$_SERVER['QUERY_STRING'] : $base;
$preserve = array_search_recursive($self, $menu);
draw_menu($menu, $preserve, $id);

?>

</body>
</html>

里面用了递归，看的我头都大了！！

有几个函数需要注意：

boolis_scalar( mixed var )
如果给出的变量参数var是一个标量，is_scalar()返回TRUE，否则返回FALSE。标量变量是指那些包含了integer、float、string或boolean的变量，而array、object和resource则不是标量。

intarray_unshift( array &array, mixed var [, mixed ...] )
array_unshift()将传入的单元插入到array数组的开头。注意单元是作为整体被插入的，因此传入单元将保持同样的顺序。所有的数值键名将修改为从零开始重新计数，所有的文字键名保持不变。返回array数组新的单元数目。

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TAG: PHP杂谈

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